Genetically modified foods Genetically modified (GM)foods are foods derived from organisms whose genetic material (DNA) has been modified in a way that does not occur naturally, e.g through the introduction of a gene from a different organism. Currently available GM foods stem mostly from plants, but in the future foods derived from GM microorganisms or GM animals are likely to be introduced on the market Most existing genetically modified crops have been developed to improve yield through the introdu ction of resistance to plant diseases or of increased tolerance of herbicides. In the future, genetic modification could be aimed at altering the nutrient content of food, reducing its allergenic potential, or improving the efficiency of food production systems. All GM foods should be assessed before being allowed on the market. FAO/WHO Codex guidelines exist for risk analysis of GM food. (www.who.int) e.g.por exemplo to stem(ed) from: vir de; prover de crops: culturas;plantações yield: rendimento (Vunesp) According to the text, genetically modified foods A have their natural DNA altered by a gene of a different organism. B naturally occurring. are so widespread that they may be considered C colthier although thou don'